Sparkproof
a. 不发出闪光的,不发出火花的
🗣️ 情景例句
She is unwilling to participate.
她不愿意参加。
The frog in well knows nothing of the great ocean.
井底之蛙不知汪洋大海。
Education is one of the key words of our time.
教育是我们这个时代的关键词之一。